Open AccessGRID LASER MARKING INFLUENCE ON HIGH-STRENGTH STEELS TENSILE TEST BEHAVIOR
Author(s) -
Daniel Krähmer,
Germán Abate,
Alejandro Simoncelli,
Nazareno Antúnez,
Vitaliy Martynenko,
Daniela Perez,
Luis Norberto Lopez De La Calle Marcaide
Publication year - 2021
Publication title -
dyna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.177
H-Index - 11
eISSN - 1989-1490
pISSN - 0012-7361
DOI - 10.6036/9869
Subject(s) - formability , automotive industry , materials science , ultimate tensile strength , dual phase steel , tensile testing , high strength steel , laser , mechanical engineering , structural engineering , composite material , engineering , microstructure , physics , optics , aerospace engineering , martensite
Automotive car companies are using AHSS (advanced high strength steels) over the last 20 years, to reduce vehicle weight and improve safety. The new steels can achieve higher strength and good fatigue resistance, but some issues related to springback and low formability are also a big concern. Thus, companies need to extend their know-how regarding material behaviour, design rules and manufacturing processes.Therefore, materials characterization laboratories are working to obtain the new formability charts of the steels. The grid laser marking of test pieces is a recent approach. However, the marking process must accomplish three main aspects: indelibility during the tensile testing procedure, precision, and of course, it must not affect the mechanical properties of studied steels.This work is focused on the laser marking of test pieces, using Ytterbium fiber laser. A dual phase steel (JFE CA 1180) is studied. Process parameter are defined.Keywords: grid marking, laser, advanced high-strength steels, AHSS, formability diagrams, mechanical properties